Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton ...

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...

Some baleen whales avoid killer whale attacks by singing songs at deep frequencies that their predators cannot hear.

A new marine predator rivalry is emerging in the waters of Australia, shaking up the long-established hierarchy of the oceans ...

Orcas, like humans, get baby bumps in the early months of pregnancy and grow larger as the pregnancy advances. Researchers ...

The New York Times reports that for a whopping thirty years, the Canadian Wildlife Health Cooperator (CWHC) never had a ...